DE3206482A1 - VENTILATION DEVICE WITH A SECURITY MONITORING DEVICE - Google Patents
VENTILATION DEVICE WITH A SECURITY MONITORING DEVICEInfo
- Publication number
- DE3206482A1 DE3206482A1 DE19823206482 DE3206482A DE3206482A1 DE 3206482 A1 DE3206482 A1 DE 3206482A1 DE 19823206482 DE19823206482 DE 19823206482 DE 3206482 A DE3206482 A DE 3206482A DE 3206482 A1 DE3206482 A1 DE 3206482A1
- Authority
- DE
- Germany
- Prior art keywords
- measuring line
- pressure
- gas source
- breathing gas
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009423 ventilation Methods 0.000 title claims description 7
- 238000012806 monitoring device Methods 0.000 title 1
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000000241 respiratory effect Effects 0.000 claims 1
- 210000004072 lung Anatomy 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes operated by electrical means
- A61M16/022—Control means therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0051—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes with alarm devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0096—High frequency jet ventilation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0015—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors
- A61M2016/0018—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical
- A61M2016/0024—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical with an on-off output signal, e.g. from a switch
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
- A61M2016/102—Measuring a parameter of the content of the delivered gas
Landscapes
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Measuring Volume Flow (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Description
D rägerwerk Aktiengesellschaft Moislinger Allee 53-55, 2400 LübeckD rägerwerk Aktiengesellschaft Moislinger Allee 53-55, 2400 Lübeck
Verfahren zur Sicherheitsüberwachung einer Beatmungsvorrichtung und Vorrichtung hierzuMethod for safety monitoring of a ventilation device and device for this
Die Erfindung betrifft ein Verfahren zur Sicherheitsüberwachung einer Beatmungsvorrichtung mit Trachealtubus, bei dem im Bereich des distalen Tubusendteils mindestens eine von einer Atemgasquelle gespeiste Jet-Düse und eine Meßleitung münden, die über einen Drucksensor und eine Schalteinheit die Atemgasquelle abschaltet, wenn der Druck einen vorgeschriebenen Grenzwert überschreitet. Außerdem werden mehrere Vorrichtungen angegeben, mit denen das Verfahren vorteilhaft durchgeführt werden kann.The invention relates to a method for safety monitoring of a ventilation device with a tracheal tube, in which in the area of the distal tube end part at least one is fed by a breathing gas source Jet nozzle and a measuring line open out, the breathing gas source via a pressure sensor and a switching unit switches off when the pressure exceeds a prescribed limit value. There are also several devices indicated, with which the method can be carried out advantageously.
Zur Beatmung bzw. zur Unterstützung der Atmung sind Beatmungsgeräte bekannt, welche eine hochfrequente Überdruckbeatmung HFPPV (high-frequence positivepressure ventilation) ermöglichen. Hierzu wird beispielsweise nach DE-OS 28 47 681 ein Trachealtubus benutzt, welcher an seinem distalen Endteil zwei von einer Atemgasquelle mit Überdruck gespeiste Jlet-Düsen und eine Prüfleitung aufweist, mit der Überwachungsvorgänge durchgeführt werden können.For ventilation or to support breathing, ventilators are known which have a high frequency Positive pressure ventilation HFPPV (high-frequency positivepressure ventilation). According to DE-OS 28 47 681, for example, a tracheal tube is used for this purpose used, which at its distal end part two Jlet nozzles fed by a breathing gas source with positive pressure and has a test lead with which monitoring processes can be carried out.
Der aus den Jet-Düsen austretende Atemgasstrahl hat einen Treibdruck von 1-5 bar. Damit wird die einströmende Gasmenge weitgehend unabhängig von der Lungenimpedanz. Bei einer Blockierung des Ausatem-The breathing gas jet emerging from the jet nozzles has a driving pressure of 1-5 bar. This becomes the inflowing Amount of gas largely independent of the lung impedance. If the exhalation is blocked
"— 5 —"- 5 -
weges (Hauptlumen) oberhalb der Jet-Austrittstelle baut sich nach relativ kurzer Zeit (ca. 20 bis 40 Sekunden!) ein. unzulässig hoher Überdruck in den Bronchien auf. Dies führt im allgemeinen durch Ruptüren zu einer schweren Schädigung, der Lunge. Die Blockierung des Ausatemweges kann in verschiedener Weise, u.a. durch eie Anhäufung von Sekret oder durch Abknicken des Trachealtubus und damit Absperrung des Auslaßweges, bei weiterer Hcchdruckgaszufuhr, eintreten.path (main lumen) above the jet exit point builds up after a relatively short time (approx. 20 to 40 Seconds!). Inadmissibly high overpressure in the Bronchi open. This generally leads to severe damage to the lungs due to ruptures. the Blockage of the exhalation path can occur in various ways, including through an accumulation of secretions or by kinking the tracheal tube and thus blocking the outlet path with further high-pressure gas supply, enter.
Zur Vermeidung dieser Nachteile ist es durch die DE-OS 28 34 037 bereits bekannt, ein Fühl- bzw. Sensorrohr in der Luftröhre anzuordnen und damit den dort herrschenden Druck zu überwachen. Wird ein unzulässiger Überdruck festgestellt, so erfolgt die Abschaltung der Atemgasquelle durch einen entsprechenden, indirekt gesteuerten Schaltmechanismus. Eine solche Ausbildung bietet jedoch keine Sicherheit gegen ein Abknicken bzw. gegen Verstopfung des Fühl- bzw. Sensorrohres, weil in diesem Falle der augenblicklich herrschende Normaldruck konserviert und trotz sofortigem Druckanstieg in der Luftröhre der Schaltmechanismus zur Abschaltung der Atemgasquelle nicht wirksam wird.To avoid these disadvantages it is through the DE-OS 28 34 037 already known, a feeler or To arrange the sensor tube in the windpipe and thus the monitor the pressure there. Becomes an illegal If excess pressure is detected, the breathing gas source is switched off by a corresponding indirectly controlled switching mechanism. However, such training does not provide security against kinking or against clogging of the sensing or sensor tube, because in this case the The currently prevailing normal pressure is preserved and despite an immediate pressure increase in the trachea the switching mechanism for switching off the breathing gas source is not effective.
Die Erfindung geht von der Aufgabenstellung aus, ein Verfahren der eingangs angegebenen Art so weiterzubilden, daß auch ein Abknicken bzw. eine Verlegung der Meßleitung überwacht werden k6nnen. Me tlfeff* wachung der Atemgaszüsammensetzung im Bereich des Austritts der Jet-Düse kann dabei zusätzlich durchThe invention is based on the task of developing a method of the type specified at the outset so that that kinking or laying of the measuring line can also be monitored. Me tlfeff * Monitoring of the breathing gas composition in the area of the outlet of the jet nozzle can also be carried out
eine Prüfleitung durchgeführt werden. Zur Lösung dieser Aufgabenstellung ist vorgesehen, daß durch die Meßleitung ein Strom eines Fluids mit wenigstens annähernd konstantem Flow geführt wird, welches an der Mündung austritt, daß der Druck in der Meßleitung die Atemgasquelle der Jet-Düse derart steuert, daß die Atemgasquelle abgeschaltet wird, wenn der Druck des Fluids in der Meßleitung einen vorgeschriebenen Grenzwert überschreitet, und daß der Flow des Fluids so gering gewählt ist, daß bei vernachlässigbarem Druckabfall in der Meßleitung der am Anschluß der Meßleitung gemessene Druck dem an der Mündung der Meßleitung gegebenen Umgebungsdruck wenigstens annähernd entspricht (Mikroflow). Dieses Verfahren bietet eine erhebliche zusätzliche Sicherheit und überwacht das Offenhalten der Meßleitung, weil beim Abknicken oder Blockieren sofort ein Druckanstieg des Fluids eintritt, welcher über eine entsprechende Sch'alteinheit die unmittelbare Abschaltung der Atemgasquelle herbeiführt.a test lead can be carried out. To solve this problem it is provided that by the measuring line carries a stream of a fluid with at least an approximately constant flow, which exits at the mouth, that the pressure in the measuring line the breathing gas source of the jet nozzle in such a way controls that the breathing gas source is switched off when the pressure of the fluid in the measuring line exceeds a prescribed limit value, and that the flow of the fluid is selected so low, that with a negligible pressure drop in the measuring line the one measured at the connection of the measuring line Pressure corresponds at least approximately to the ambient pressure given at the mouth of the measuring line (Microflow). This procedure offers a considerable additional security and monitors the keeping open the measuring line, because if it kinks or becomes blocked, the pressure of the fluid increases immediately, which switches off the breathing gas source immediately via a corresponding switching unit brings about.
Der Flow des Fluids ist dabei so gering, daß der über die Meßleitung entstehende Druckabfall (< 2^bar) vernachlässigbar ist. Damit entspricht der am Anschluß der Meßleitung gemessene Druck dem im Bereich der Atemwege.The flow of the fluid is so low that the pressure drop (< 2 ^ bar) is negligible. This corresponds to the one at the connection the pressure measured in the measuring line to the pressure in the area of the airways.
Das verwendete Fluid kann zweckmäßig eine Flüssigkeit oder ein Gas bzw. Gasgemisch sein. Bei der Verwendung einer Flüssigkeit, z.B. Wasser, läßt sich diese gegebenenfalls zweckmäßig zur Befeuchtung desThe fluid used can expediently be a liquid or a gas or gas mixture. When using a liquid, e.g. water, this can optionally be expedient for moistening the
— "7 —- "7 -
— 7 —- 7 -
von der Jet-Düse abgegebenen Atemgases verwenden. Als gasförmiges Fluid kann vorteilhaft eine Atemgaskomponente verwendet werden.Use breathing gas delivered by the jet nozzle. A breathing gas component can advantageously be used as the gaseous fluid be used.
Eine Vorrichtung zur Durchführung des Verfahrens kann zweckmäßig so aufgebaut sein, daß die Meßleitung mit einer wenigstens annähernd auf konstanten Flow steuerbaren Zuführvorrichtung eines Fluids verbunden ist, und daß der Drucksensor zwischen der Zuführvorrichtung und dem Anschluß der Meßleitung liegt. Für die Ausbildung im einzelnen sind verschiedene alternative Lösungen möglich, von denen mehrere in den Ansprüchen 6,7 und 8 beschrieben werden.A device for carrying out the method can expediently be constructed in such a way that the measuring line with an at least approximately constant flow controllable feed device one Fluids is connected, and that the pressure sensor between the feed device and the connection the measuring line. Various alternative solutions are possible for the individual training, Several of which are described in claims 6, 7 and 8.
In der Zeichnung sind Ausführungsbeispiele des Gegenstandes der Erfindung schematisch dargestellt; es zeigenIn the drawing are exemplary embodiments of the subject the invention shown schematically; show it
Fig. 1 ein Blockdiagramm zur Erläuterung desFig. 1 is a block diagram to explain the
Ve rf ah rens,Procedure,
Fig. 2, alternative Ausbildungen von Vorrichtungen 3 und 4 zur Erzeugung des Mikroflcw.2, alternative designs of devices 3 and 4 for producing the microflcw.
in Figur 1 ist ein Trachealtubus 1 dargestellt, welcher eine von einer Atemgasquelle gespeiste Jet-Düse 2 und eine" in die Tubuswand eingebettete Meßleitung 3 aufweist. Zur Fixierung des Tubus ist eine aufblasbare Abdichtungsmanschette 4 vorgesehen.In Figure 1, a tracheal tube 1 is shown, which has a jet nozzle 2 fed by a breathing gas source and a measuring line 3 embedded in the tube wall. An inflatable sealing cuff 4 is provided to fix the tube.
Von der zentralen Gasversorgung ZGV werden eine Atemgasquelle und eine Vorrichtung (Flow Stat.) gespeist, welche einen annähernd konstanten Mikroflow mit einem Druck von etwa 2 mbar durch die Meßleitung 3 in Richtung des distalen Tubusendteils erzeugt.A breathing gas source and a device (flow stat.) Are supplied from the central gas supply ZGV. fed, which has an almost constant microflow with a pressure of about 2 mbar through the measuring line 3 in the direction of the distal tube end part generated.
Der Druck in dieser Meßleitung 3 wird durch einen Drucksensor mit elektrischem Signalausgang überwacht. Das elektrische Ausgangssignal löst beim Überschreiten eines vorgegebenen Grenzwertes in einem Grenzwertschalter (St) ein Steuersignal aus, welches eine akustische Warnanlage einschaltet und über eine Schalteinheit die Abschaltung der Atemgasquelle herbeiführt.The pressure in this measuring line 3 is monitored by a pressure sensor with an electrical signal output. The electrical output signal triggers when a specified limit value is exceeded in a limit switch (St) emits a control signal which switches on an acoustic warning system and switches off the breathing gas source via a switching unit.
Bei der Anordnung nach Figur 2 ist der zentralen Gasversorgung ZGV ein Druckminderer und eine Drosselstelle nachgeschaltet, welche den konstanten Mikrof1 ow erzeugen. Der Druckanstieg in der Meßleitung wird durch den zwischen der Drosselstelle und dem Anschluß der Meßleitung 3 eingeschalteten Drucksensor überwacht.In the arrangement according to FIG. 2, the central gas supply ZGV is a pressure reducer and a throttle point downstream, which generate the constant microf1 ow. The rise in pressure in the measuring line is controlled by the pressure sensor connected between the throttle point and the connection of the measuring line 3 supervised.
Die Ausbildung nach Figur 3 benutzt zur Erzeugung des Mikroflow Wasser aus einem Vorratsbehälter 5, welches durch eine Schlauchpumpe 6 in die Meßleitung 3 gefördert wird.The embodiment according to FIG. 3 uses water from a storage container 5 to generate the microflow, which is conveyed into the measuring line 3 by a hose pump 6.
Bei der Ausführung nach Figur 4 ist, ebenfalls unter Verwendung eines flüssigen Fluids, ein mit der Flüssigkeit gefüllter, elastischer Beutel 7 vorgesehen,In the embodiment according to FIG. 4, also using a liquid fluid, one with the Liquid-filled, elastic bag 7 is provided,
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welcher von einer Druckmanschette 8 umgeben ist. Die Druckmanschette 8 wird von der zentralen Gasversorgung unter Zwischenschaltung eines Druckminderers aufgeblasen, und dadurch wird der elastische Beutel 7 langsam entleert.which is surrounded by a pressure cuff 8. The pressure cuff 8 is from the central gas supply inflated with the interposition of a pressure reducer, and thereby the elastic bag 7 is slowly emptied.
Claims (7)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3206482A DE3206482C2 (en) | 1982-02-23 | 1982-02-23 | Ventilation device with a device for safety monitoring |
CH6093/82A CH657781A5 (en) | 1982-02-23 | 1982-10-19 | METHOD FOR SAFETY MONITORING A VENTILATION DEVICE AND DEVICE THEREFOR. |
NLAANVRAGE8204263,A NL184824C (en) | 1982-02-23 | 1982-11-03 | METHOD FOR THE SAFETY CHECK OF A BREATHING DEVICE AND APPARATUS. |
SE8206830A SE456219B (en) | 1982-02-23 | 1982-11-30 | APPARATUS FOR SUPPLY OF BREATHING GAS BY A TRAKEAL CANON AND WITH A SAFETY MONITORING DEVICE |
GB08300103A GB2114896B (en) | 1982-02-23 | 1983-01-05 | Monitoring the pressure of a ventilator |
US06/463,644 US4535766A (en) | 1982-02-23 | 1983-02-03 | Method and apparatus for monitoring a respirator usable with an endotracheal tube |
FR8302879A FR2522168B1 (en) | 1982-02-23 | 1983-02-14 | METHOD FOR CONTROLLING THE SECURITY OF AN ARTIFICIAL RESPIRATOR AND DEVICE FOR IMPLEMENTING SAME |
BE0/210145A BE895945A (en) | 1982-02-23 | 1983-02-18 | METHOD AND DEVICE FOR SECURITY CONTROL OF AN ARTIFICIAL BREATHING DEVICE |
JP58027096A JPS58155870A (en) | 1982-02-23 | 1983-02-22 | Method for safe monitoring of aspiration apparatus and aspiration apparatus having safe monitor apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3206482A DE3206482C2 (en) | 1982-02-23 | 1982-02-23 | Ventilation device with a device for safety monitoring |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3206482A1 true DE3206482A1 (en) | 1983-11-03 |
DE3206482C2 DE3206482C2 (en) | 1984-03-15 |
Family
ID=6156488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3206482A Expired DE3206482C2 (en) | 1982-02-23 | 1982-02-23 | Ventilation device with a device for safety monitoring |
Country Status (9)
Country | Link |
---|---|
US (1) | US4535766A (en) |
JP (1) | JPS58155870A (en) |
BE (1) | BE895945A (en) |
CH (1) | CH657781A5 (en) |
DE (1) | DE3206482C2 (en) |
FR (1) | FR2522168B1 (en) |
GB (1) | GB2114896B (en) |
NL (1) | NL184824C (en) |
SE (1) | SE456219B (en) |
Cited By (1)
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CN112145229A (en) * | 2020-09-22 | 2020-12-29 | 中煤能源研究院有限责任公司 | Non-contact dynamic continuous measuring system and method for coal seam gas content of coal roadway driving face |
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US4971034A (en) * | 1985-01-16 | 1990-11-20 | Asahi Kogaku Kogyo Kabushiki Kaisha | Body cavity pressure adjusting device for endoscope and laser medical treatment apparatus including body cavity pressure adjusting device |
US4744356A (en) * | 1986-03-03 | 1988-05-17 | Greenwood Eugene C | Demand oxygen supply device |
US4796467A (en) * | 1987-04-30 | 1989-01-10 | Biosystems Inc. | Testing device for respiratory protective devices |
FR2638092B1 (en) * | 1988-10-26 | 1990-12-28 | Boussignac Georges | RESPIRATORY ASSISTANCE APPARATUS |
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US5148802B1 (en) * | 1989-09-22 | 1997-08-12 | Respironics Inc | Method and apparatus for maintaining airway patency to treat sleep apnea and other disorders |
US5188098A (en) * | 1991-11-04 | 1993-02-23 | The Trustees Of The University Of Pennsylvania | Method and apparatus for ECG gated ventilation |
US5183038A (en) * | 1991-11-04 | 1993-02-02 | The Trustees Of The University Of Pennsylvania | Gated programmable ventilator |
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AU2011292111B2 (en) | 2010-08-16 | 2015-03-26 | Breathe Technologies, Inc. | Methods, systems and devices using LOX to provide ventilatory support |
CA3027061C (en) | 2010-09-30 | 2020-12-01 | Breathe Technologies, Inc. | Methods, systems and devices for humidifying a respiratory tract |
NZ701073A (en) * | 2012-04-23 | 2016-04-29 | Chiesi Farma Spa | Method and system for the administration of a pulmonary surfactant by atomization |
US10792449B2 (en) | 2017-10-03 | 2020-10-06 | Breathe Technologies, Inc. | Patient interface with integrated jet pump |
US11596759B2 (en) * | 2018-12-12 | 2023-03-07 | General Electric Company | Methods and systems for a medical gas delivery module |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE2847681A1 (en) * | 1978-11-03 | 1980-05-08 | Draegerwerk Ag | TRACHEAL TUBE |
Family Cites Families (10)
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US3730180A (en) * | 1970-10-21 | 1973-05-01 | Mine Safety Appliances Co | Pneumatically operated ventilator |
US3817246A (en) * | 1972-12-11 | 1974-06-18 | Puritan Bennett Corp | Flow responsive respiration apparatus |
US3972327A (en) * | 1973-03-22 | 1976-08-03 | Hoffmann-La Roche Inc. | Respirator |
AT337345B (en) * | 1975-02-05 | 1977-06-27 | Draegerwerk Ag | BREATHING ASSISTANCE DEVICE AND / OR ARTIFICIAL VENTILATION DEVICE FOR HUMAN USE |
US3976065A (en) * | 1975-03-10 | 1976-08-24 | Gerald Durkan | Digital fluidic ventilator |
US4141356A (en) * | 1976-06-16 | 1979-02-27 | Bourns, Inc. | Respirator system and method |
SE435017B (en) * | 1976-10-26 | 1984-09-03 | Puritan Bennett Corp | The ventilator |
DE2831313A1 (en) * | 1978-07-17 | 1980-02-07 | Draegerwerk Ag | DEVICE FOR SUPPORTING BREATHING AND / OR ARTIFICIAL VENTILATION |
SE425595B (en) * | 1978-11-29 | 1982-10-18 | Siemens Elema Ab | DEVICE OF A RESPIRATORY DEVICE |
DE2947659C2 (en) * | 1979-11-27 | 1986-11-20 | Drägerwerk AG, 2400 Lübeck | Ventilator |
-
1982
- 1982-02-23 DE DE3206482A patent/DE3206482C2/en not_active Expired
- 1982-10-19 CH CH6093/82A patent/CH657781A5/en not_active IP Right Cessation
- 1982-11-03 NL NLAANVRAGE8204263,A patent/NL184824C/en not_active IP Right Cessation
- 1982-11-30 SE SE8206830A patent/SE456219B/en not_active IP Right Cessation
-
1983
- 1983-01-05 GB GB08300103A patent/GB2114896B/en not_active Expired
- 1983-02-03 US US06/463,644 patent/US4535766A/en not_active Expired - Fee Related
- 1983-02-14 FR FR8302879A patent/FR2522168B1/en not_active Expired
- 1983-02-18 BE BE0/210145A patent/BE895945A/en unknown
- 1983-02-22 JP JP58027096A patent/JPS58155870A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE2847681A1 (en) * | 1978-11-03 | 1980-05-08 | Draegerwerk Ag | TRACHEAL TUBE |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112145229A (en) * | 2020-09-22 | 2020-12-29 | 中煤能源研究院有限责任公司 | Non-contact dynamic continuous measuring system and method for coal seam gas content of coal roadway driving face |
Also Published As
Publication number | Publication date |
---|---|
FR2522168B1 (en) | 1986-12-19 |
FR2522168A1 (en) | 1983-08-26 |
GB2114896B (en) | 1985-06-26 |
SE456219B (en) | 1988-09-19 |
NL8204263A (en) | 1983-09-16 |
JPS58155870A (en) | 1983-09-16 |
SE8206830L (en) | 1983-08-24 |
GB2114896A (en) | 1983-09-01 |
NL184824C (en) | 1989-11-16 |
CH657781A5 (en) | 1986-09-30 |
GB8300103D0 (en) | 1983-02-09 |
SE8206830D0 (en) | 1982-11-30 |
NL184824B (en) | 1989-06-16 |
US4535766A (en) | 1985-08-20 |
DE3206482C2 (en) | 1984-03-15 |
BE895945A (en) | 1983-06-16 |
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